The RifleBlok 556 is expertly designed to provide safe, effective dry fire practice for rifles chambered in .223 Remington/5.56 NATO. This innovative device fits seamlessly into your AR-15 style carbine, rendering it completely inert while allowing for realistic handling and operation. The RifleBlok 556 offers a visual safety indicator to confirm that your firearm is safe, and it protects the firing pin from potential damage during training exercises.Perfect for training, drills, or skill enhancement, RifleBlok 556 ensures you can practice without the need for disassembly. It's an essential tool for anyone dedicated to safe and realistic firearm training.1 RifleBlok training device3 MagBlok 556 magazine inserts1 Instruction booklet for easy setup and usage